Microsoft Hardware has released a beta device center that allows you to configure your Microsoft Mouse and Keyboard in Windows 8.
The Device Center Beta is available in both 32 and 64 bit versions and is available the the Microsoft Hardware Download page. The beta is only available in English right now and runs in the Windows 8 Consumer Preview Desktop environment.
The device center beta lets you configure your mouse and keyboard with a series of basic settings and also allows you to apply settings to a specific program or app.
If you are on an Internet connection without any data download restrictions make sure you select to allow device specific information to be downloaded.